243 



vex iu front, and extends like a hood over the head as far as the posterior margin of 

 the eyes. Beneath each segment and hetween each double pair of legs is a plate, in 

 shape either triangular, quadrangular or pentagonal. This species has 180 legs. 

 It emits a powerful scent, something like that of decayed walnuts. A specimen that 

 appeared to be of this species had a shining purple colour. 



Julus pusillus. — Found in the autumn on decayed cabbage-roots with J. pulchel- 

 lus, and with a species of Sunius and Khyzophagus ferrugineus. When young it is 

 white, like J. pulchellus, but less clear and often inclining to pale buff, particularly 

 towards the head ; it differs also in having a shorter and thicker body^ and the lluid 

 round the pores is duller than that of J. pulchellus. 



Genus. — Geophilus. 

 Both Geophilus subterraneus and G. longicornis are altogether pale tawny, ex- 

 cept the head, which is somewhat darker ; on each side of it is a very minute dark 

 speck but just visible, — this is the eye. The antennas are setaceous and slightly 

 hairy, and have 14 joints, and by them these two species are easily distinguished, the 

 antennae of G. longicornis being twice the length of those of G. subterraneus, and 

 much thicker. Each dorsal segment of the body is divided into three portions by 

 two longitudinal parallel sutures ; the middle part is narrower than that on either 

 side. The spiracles are distinctly seen between the dorsal and sternal segments. 

 G. subterraneus has about 70 leg-bearing segments, and between each is a narrower 

 one ; G. longicornis has about 66 segments ; so that the one has 140 legs and 140 

 segments, the other 112 legs and as many segments. These segments are shortest 

 next the head, and thence increase in length to the end of the body, and their num- 

 ber gives the insect that great freedom of motion iu which it far surpasses all other 

 genera of Chilopoda. They twist, contort and wriggle their bodies into a variety of 

 forms, and when touched they often keep the hind part of the body motionless, and 

 withdraw the head by bending the fore part of the body on either side many 

 times. The head is flat and long, and truncate in front, and the suture by which 

 it is divided into two segments is distinct. The jaws cross each other when at 

 rest, and are hooked, shining, smooth and black, their base only being yellow. The 

 labium has a longitudinal suture. These two species are pale, and the tips of their 

 jaws are fulvous when young. G. carpophagus has only 104 legs, increasing in 

 length from the head to the tail. 



Francis Walker. 



(To be continued). 



Art. LXII. — Ceramhycitum Tnsularum Manillarum Dom. Cuming 

 captorum enumeratio digesta. Auctore Edward Newman. 



PROCEMIUM. 



Metamorphoseos diversi ratione in qiiatuor classes dividuntur 

 Insecta tetraptera ; scilicet Anisomorpha, Amorpha, Necromor- 

 PHA et Isomorpha: Necromorpliarum divisio bina, nempe Hymenop- 

 TERA et Coleoptera. 



